Which of the following species are isoelectronic species:
Na+,K+,Mg2+,Ca2+,S2-,Ar
ii) Although both CO2 and H2O are triatomic in nature the shape of H2O molecule is bent while that of CO2 is linear. Justify
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Answer:
Na⇒1s
2
,2s
2
2p
6
,3s
1
Na
+
⇒1s
2
,2s
2
2p
6
similarly for Mg
2+
⇒1s
2
,2s
2
2p
6
Na
+
,Mg
2+
, are isoelectronic species. They contain 10 electrons each.
S
2−
⇒1s
2
,2s
2
2p
6
,3s
2
3p
6
Ar⇒1s
2
,2s
2
2p
6
,3s
2
3p
6
K
+
⇒1s
2
,2s
2
2p
6
,3s
2
3p
6
Ca
2+
⇒1s
2
,2s
2
2p
6
,3s
2
3p
6
Ar,S
2−
,Ca
2+
andK
+
are isoelectronic species. They contain 18 electrons each.
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